1、 ISO 2015 Gaseous fire-extinguishing systems Physical properties and system design Part 14: IG-55 extinguishant Systmes dextinction dincendie utilisant des agents gazeux Proprits physiques et conception des systmes Partie 14: Agent extincteur IG-55 INTERNATIONAL STANDARD ISO 14520-14 Third edition 2
2、015-02-15 Reference number ISO 14520-14:2015(E) ISO 14520-14:2015(E)ii ISO 2015 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2015 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or me
3、chanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749
4、 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ISO 14520-14:2015(E)Contents Page Foreword iv 1 Scope . 1 2 Normative reference . 1 3 Terms and definitions . 1 4 Characteristics and uses . 1 4.1 General . 1 4.2 Use of IG-55 systems 2 5 Safety of personne
5、l . 5 6 System design 6 6.1 Fill pressure . 6 6.2 Superpressurization . 6 6.3 Extinguishant quantity . 6 7 Environmental properties 7 ISO 2015 All rights reserved iii ISO 14520-14:2015(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standard
6、s bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organiz
7、ations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The procedures used to develop this document and those intended for its fu
8、rther maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/direct
9、ives). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the
10、Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement. For an explanation on the meaning of ISO specific terms and expressions relate
11、d to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT), see the following URL: Foreword Supplementary information. The committee responsible for this document is ISO/TC 21, Equipment for fire protection and fire fighting
12、, Subcommittee SC 8, Gaseous media firefighting systems using gas. This third edition cancels and replaces the second edition (I S O 14520-14:2005), has been technically revised. ISO 14520 consists of the following parts, under the general title Gaseous fire-extinguishing systems Physical properties
13、 and system design: Part 1: General requirements Part 2: CF 3 I extinguishant Part 5: FK-5-1-12 extinguishant Part 6: HCFC Blend A extinguishant Part 8: HFC 125 extinguishant Part 9: HFC 227ea extinguishant Part 10: HFC 23 extinguishant Part 11: HFC 236fa extinguishant Part 12: IG-01 extinguishant P
14、art 13: IG-100 extinguishant Part 14: IG-55 extinguishant Part 15: IG-541 extinguishant Parts 3, 4, and 7, which dealt with FC-2-1-8, FC-3-1-10, and HCFC 124 extinguishants, respectively, have been withdrawn, as these types are no longer manufactured.iv ISO 2015 All rights reserved Gaseous fire-exti
15、nguishing systems Physical properties and system design Part 14: IG-55 extinguishant 1 Scope This part of ISO 14520 contains specific requirements for gaseous fire-extinguishing systems, with respect to the IG-55 extinguishant. It includes details of physical properties, specification, usage and saf
16、ety aspects. This part of ISO 14520 covers systems operating at nominal pressures of 150 bar at 15 C, 200 bar at 15 C, and 300 bar at 15 C. This does not preclude the use of other systems, although design data for other pressures are not available at this time. 2 Normative reference The following do
17、cuments, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 14520-1:2006, Gaseo
18、us fire-extinguishing systems Physical properties and system design Part 1: General requirements 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 14520-1 apply. 4 Characteristics and uses 4.1 General IG-55 is a colourless, odourless, electrically non-
19、conductive gas with a density approximately the same as that of air. It is an inert gas mixture consisting nominally of 50 % argon and 50 % nitrogen. The mixture specification for IG-55 is as follows: a) argon percentage range (50 5) % b) nitrogen percentage range (50 5) % Extinguishant IG-55 shall
20、comply with the specification shown in Table 1. The physical properties are shown in Table 2. IG-55 extinguishes fires by reduction of the oxygen concentration in the atmosphere of the hazard enclosure. INTERNATIONAL ST ANDARD ISO 14520-14:2015(E) ISO 2015 All rights reserved 1 ISO 14520-14:2015(E)
21、Table 1 Specification for IG-55 Component Argon Nitrogen Purity 99,9 % 99,9 % Moisture 15 10 6 10 10 6 NOTE Only principal contaminants are shown. Other measurements can include hydrocarbons, CO, NO, NO 2 , CO 2 , O 2 , etc. Most are 20 106. Table 2 Physical properties of IG-55 Property Units Value
22、Molecular mass 33,98 Boiling point at 1,013 bar (absolute) C Freezing point C Critical temperature C Critical pressure bar abs Critical volume cm 3 /mol Critical density kg/m 3 Vapour pressure 20 C bar abs Liquid density 20 C kg/m 3 Saturated vapour density 20 C kg/m 3 Specific volume of superheated
23、 vapour at 1,013 bar and 20 C m 3 /kg 0,708 Components N 250 % by volume Ar 50 % by volume NOTE IG-55 is a mixture of two gases. For further details on its physical properties, refer to ISO standards for the individual gases. 4.2 Use of IG-55 systems IG-55 total flooding systems can be used for exti
24、nguishing fires of all classes within the limits specified in ISO 14520-1:2006, Clause 4. The extinguishing concentrations and design concentrations for heptane and surface class A hazards are shown in Table 4. Concentrations for other fuels are shown in Table 5. The extinguishant requirements per v
25、olume of protected space are shown in Table 3 for various levels of concentration. These are based on methods shown in ISO 14520-1:2006, 7.6.2 ISO 2015 All rights reserved ISO 14520-14:2015(E) Table 3 IG-55 total flooding quantity TemperatureT C Specific vapour volume S IG-55 volume requirements per
26、 unit volume of protected space, V/V (m 3 /m 3 ) Design concentration (by volume) m 3 /kg 34 % 38 % 42 % 46 % 50 % 54 % 58 % 62 % 40 0,5632 0,524 0,603 0,687 0,778 0,875 0,980 1,095 1,221 35 0,5752 0,513 0,591 0,673 0,761 0,856 0,959 1,072 1,195 30 0,5873 0,503 0,578 0,659 0,746 0,839 0,940 1,050 1,
27、171 25 0,5994 0,493 0,567 0,646 0,731 0,822 0,921 1,029 1,147 20 0,6115 0,483 0,556 0,633 0,716 0,806 0,902 1,008 1,125 15 0,6236 0,474 0,545 0,621 0,702 0,790 0,885 0,989 1,103 10 0,6356 0,465 0,534 0,609 0,689 0,775 0,868 0,970 1,082 5 0,6477 0,456 0,524 0,598 0,676 0,761 0,852 0,952 1,062 0 0,659
28、8 0,448 0,515 0,587 0,664 0,747 0,836 0,934 1,042 5 0,6719 0,440 0,506 0,576 0,652 0,733 0,821 0,918 1,023 10 0,6840 0,432 0,497 0,566 0,640 0,720 0,807 0,901 1,005 15 0,6960 0,424 0,488 0,556 0,629 0,708 0,793 0,886 0,988 20 0,7081 0,417 0,480 0,547 0,618 0,696 0,779 0,871 0,971 25 0,7202 0,410 0,4
29、72 0,538 0,608 0,684 0,766 0,856 0,955 30 0,7323 0,403 0,464 0,529 0,598 0,673 0,754 0,842 0,939 35 0,7444 0,397 0,456 0,520 0,588 0,662 0,741 0,828 0,924 40 0,7564 0,390 0,449 0,512 0,579 0,651 0,730 0,815 0,909 45 0,7685 0,384 0,442 0,504 0,570 0,641 0,718 0,802 0,895 50 0,7806 0,378 0,435 0,496 0
30、,561 0,631 0,707 0,790 0,881 55 0,7927 0,373 0,429 0,488 0,552 0,621 0,696 0,778 0,867 60 0,8048 0,367 0,422 0,481 0,544 0,612 0,686 0,766 0,854 65 0,8168 0,362 0,416 0,474 0,536 0,603 0,676 0,755 0,842 70 0,8289 0,356 0,410 0,467 0,528 0,594 0,666 0,744 0,830 75 0,8410 0,351 0,404 0,460 0,521 0,586
31、 0,656 0,733 0,818 80 0,8531 0,346 0,398 0,454 0,513 0,577 0,647 0,723 0,806 85 0,8652 0,341 0,393 0,447 0,506 0,569 0,638 0,713 0,795 90 0,8772 0,337 0,387 0,441 0,499 0,562 0,629 0,703 0,784 95 0,8893 0,332 0,382 0,435 0,492 0,554 0,621 0,693 0,773 100 0,9014 0,328 0,377 0,429 0,486 0,546 0,612 0,
32、684 0,763 NOTE This information refers only to the product IG-55, and does not represent any other products contain- ing argon as a component. Symbols: V/V is the agent volume requirements (m 3 /m 3 ); i.e. the quantity Q R (m 3 ) of agent required at a ref- erence temperature of 20 C and a pressure
33、 of 1,013 bar per cubic metre of protected volume to produce the indicated concentration at the temperature specified: ISO 2015 All rights reserved 3 ISO 14520-14:2015(E)S R where is the specific reference volume (m 3 /kg); i.e. the specific vapour volume at the filling reference temperature for sup
34、erheated IG-55vapour at a pressure of 1,013 bar which can be approximated by the formula: ; wherek 1= 0,659 8 k 2= 0,002 416 is the reference temperature (C); i.e. filling temperature (20 C in the table). V is the net volume of hazard (m 3 ); i.e. the enclosed volume minus the fixed structures imper
35、vious to extinguishant; T is the temperature (C); i.e. the design temperature of the protected area; S is the specific volume (m 3 /kg); the specific volume of superheated IG-55 vapour at a pressure of 1,013 bar can be approximated by the formula:S = k 1+ k 2T where c is the concentration (%); i.e.
36、the volumetric concentration of IG-55 in air at the temperature indi- cated, and a pressure of 1,013 bar absolute. Table 4 IG-55 reference extinguishing and design concentrations Fuel Extinguishment % by volume Minimum design % by volume Class B Heptane (cup burner) Heptane (room test)36,5 30,247, 5
37、 Surface class A Wood Crib PMMA PP ABS28,7 30,7 29,3 31,040,3 Higher Hazard Class A See Note 4 45,1 NOTE 1 The extinguishment values for the Class B and the Surface Class A fuels are determined by testing in accordance with ISO 14520-1:2006, Annexes B and C. NOTE 2 The minimum design concentration f
38、or the Class B fuel is the higher value of the heptane cup burner or room test heptane extinguishment concentration multiplied by 1,3.Table 3 (continued) 4 ISO 2015 All rights reserved ISO 14520-14:2015(E) NOTE 3 The minimum design concentration for Surface Class A fuel is the highest value of the w
39、ood crib, PMMA, PP, or ABS extinguishment concentrations multiplied by 1,3. In the absence of any of the 4 extinguish- ment values, the minimum design concentration for Surface Class A shall be that of Higher Hazard Class A. NOTE 4 Higher-Hazard Class A hazards are those having the characteristics d
40、escribed in the CAUTION state- ment of ISO 14520-1:2006, 7.5.1.3. The minimum design concentration for Higher Hazard Class A fuels shall be the higher of the Surface Class A or 95 % of the Class B minimum design concentration. NOTE 5 See ISO 14520-1:2006, 7.5.1.3 for guidance on Class A fuels. NOTE
41、6 The extinguishing and design concentrations for room-scale test fires are for informational pur- poses only. Lower and higher extinguishing concentrations than those shown for room-scale test fires can be achieved and allowed when validated by test reports from internationally recognized laborator
42、ies. Table 5 IG-55 extinguishing and design concentrations for other fuels Fuel Extinguishment % by volume Minimum design % by volume Ethanol 38,9 50,6 n-Hexane 37,0 48,0 Isooctane 36,5 47, 5 Methyl ethyl ketone 38,0 49,4 Methanol 45,4 59,0 i-Propanol 36,5 47, 5 Toluene 36,5 47, 5 NOTE 1 Extinguishi
43、ng concentrations for all Class B fuels listed were derived in accordance with ISO 14520-1:2006, Annex B. NOTE 2 Minimum design values have been increased to the minimum design concentration established for heptane in accordance with ISO 14520-1:2006, 7.5.1. 5 Safety of personnel Any hazard to perso
44、nnel created by the discharge of IG-55 shall be considered in the design of the system. Potential hazards can arise from the following: a) the extinguishant itself, by reduction in oxygen; and b) the combustion products of the fire. For minimum safety requirements, see ISO 14520-1:2006, Clause 5. Ph
45、ysiological information for IG-55 is shown in Table 6. Table 6 Physiological information for IG-55 Property Value % by volume No observed adverse effect level (NOAEL) 43 Lowest observed adverse effect level (LOAEL) 52 NOTE These values are based on the physiological effects on h uman subjects of hyp
46、oxic atmospheres. These values are the functional equivalents of NOAEL and LOAEL values, and correspond to 12 % minimum oxygen for the no-effect level and 10 % minimum oxygen for the low-effect level.Table 4 (continued) ISO 2015 All rights reserved 5 ISO 14520-14:2015(E) 6 System design 6.1 Fill pre
47、ssure The fill pressure of the container shall not exceed the values given in Tables 7, 8, and 9 for systems operating at 150 bar at 15 C, 200 bar at 15 C, and 300 bar at 15 C respectively. Other pressures can be used and the minimum design pressure specified accordingly. The relationships between p
48、ressure and temperature are shown in Figure 1. Table 7 150 bar storage container characteristics for IG-55 Property Unit Value Filling pressure at 15 C bar 150 Maximum container working pressure at 50 C bar 178 NOTE Reference should be made to Figure 1 for further data on pressure/temperature relati
49、onships. Table 8 200 bar storage container characteristics for IG-55 Property Unit Value Filling pressure at 15 C bar 200 Maximum container working pressure at 50 C bar 240 NOTE Reference should be made to Figure 1 for further data on pressure/temperature relationships. Table 9 300 bar storage container characteristics for IG-55 Property Unit Value Filling pressure
